/*
 * Copyright (c) 2017 Boucher, Antoni <bouanto@zoho.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#[doc(hidden)]
pub trait IntoOption<T> {
    #[doc(hidden)]
    fn into_option(self) -> Option<T>;
}

impl<T> IntoOption<T> for Option<T> {
    fn into_option(self) -> Option<T> {
        self
    }
}

impl<T> IntoOption<T> for () {
    fn into_option(self) -> Option<T> {
        None
    }
}

#[doc(hidden)]
pub trait IntoPair<A, B> {
    #[doc(hidden)]
    fn into_pair(self) -> (A, B);
}

impl<A, B> IntoPair<Option<A>, B> for B {
    fn into_pair(self) -> (Option<A>, B) {
        (None, self)
    }
}

impl<A, B> IntoPair<A, B> for (A, B) {
    fn into_pair(self) -> (A, B) {
        self
    }
}
